Keystones — Lintel
Five GCSE retrieval questions · 5 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0073
Answer: 7.3 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 30°. Find opposite
Answer: 17.3cm -
4. Ratio Mixed ratio problems
Divide 180 in the ratio 3:4:2
Answer: 60, 80 and 40 -
5. Statistics Mean
Calculate the mean of: 29, 45, 39, 23, 11, 42, 40, 6
Answer: 29.4